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Dynamics of quantum discord in the purification process

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arxiv 1101.2568 v2 pith:UULV7XYE submitted 2011-01-13 quant-ph

Dynamics of quantum discord in the purification process

Wei Song , Lin Chen , Ming Yang , Zhuo-Liang Cao This is my paper
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keywords quantumdiscordprocesspurificationduringdynamicsincreasedstates
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We investigate the dynamics of quantum discord during the purification process. In the case of Werner states, it is shown that quantum discord is increased after a round of purification protocol. Furthermore, quantum mutual information and classical correlation is also increased during this process.Wealso give an analytic expression for a class of higher dimensional states which have additive quantum discord.

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